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Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios] — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSTrigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]1 Mark
Question
State for any acute $\angle \theta $ whether $\sin \theta $ increases or decreases as $\theta $ increases
Increases
Decreases
✓

Answer

For acute angles, remember what sine means: opposite over hypotenuse.
If we increase the angle, then the opposite side gets larger.
That means $"$opposite/hypotenuse$"$ gets larger or increases.

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